Malware Analysis Report

2025-08-06 03:42

Sample ID 230921-3vfxsabb5s
Target a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645
SHA256 a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645
Tags
smokeloader pub1 backdoor trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645

Threat Level: Known bad

The file a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645 was found to be: Known bad.

Malicious Activity Summary

smokeloader pub1 backdoor trojan

SmokeLoader

Suspicious use of SetThreadContext

Unsigned PE

Suspicious use of WriteProcessMemory

Checks SCSI registry key(s)

Suspicious behavior: GetForegroundWindowSpam

Uses Task Scheduler COM API

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-21 23:49

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-21 23:49

Reported

2023-09-21 23:52

Platform

win10v2004-20230915-en

Max time kernel

150s

Max time network

140s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe"

Signatures

SmokeLoader

trojan backdoor smokeloader

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe N/A
Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A N/A N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4956 wrote to memory of 1552 N/A C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe
PID 4956 wrote to memory of 1552 N/A C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe
PID 4956 wrote to memory of 1552 N/A C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe
PID 4956 wrote to memory of 1552 N/A C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe
PID 4956 wrote to memory of 1552 N/A C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe
PID 4956 wrote to memory of 1552 N/A C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe

"C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe"

C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe

"C:\Users\Admin\AppData\Local\Temp\a3d27d8b35f72399f5c74c2d80a726a3d8fb1c91d834e02e55cfd2e854cf4645.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 133.113.22.20.in-addr.arpa udp
US 8.8.8.8:53 254.22.238.8.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 host-file-host6.com udp
US 8.8.8.8:53 host-host-file8.com udp
NL 194.169.175.127:80 host-host-file8.com tcp
US 8.8.8.8:53 127.175.169.194.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 240.81.21.72.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 1.202.248.87.in-addr.arpa udp
US 8.8.8.8:53 14.173.189.20.in-addr.arpa udp

Files

memory/4956-2-0x0000000002470000-0x0000000002479000-memory.dmp

memory/4956-1-0x0000000000720000-0x0000000000820000-memory.dmp

memory/1552-3-0x0000000000400000-0x0000000000409000-memory.dmp

memory/1552-4-0x0000000000400000-0x0000000000409000-memory.dmp

memory/1552-6-0x0000000000400000-0x0000000000409000-memory.dmp

memory/3120-5-0x0000000000DB0000-0x0000000000DC6000-memory.dmp